CN220101432U - Single blade replacement device for small fan - Google Patents

Abstract

The utility model relates to a single-blade replacement device of a small fan, which relates to the technical field of blade replacement of wind driven generators and comprises an overhaul mechanism, a blade root clamp and a blade lifting mechanism; the overhaul mechanism comprises a lifting piece and an overhaul platform, wherein the lifting piece is arranged on the engine room and is used for lifting the overhaul platform to the top of the tower barrel; the blade root clamp is used for clamping and fixing the blade root to be replaced; the blade lifting mechanism comprises a pulley, a winch and a steel wire rope, wherein the pulley is arranged on the engine room, and the steel wire rope is wound on the winch and is connected with the blade root clamp and the pulley. According to the utility model, the components are matched, so that the replacement of the fan blade can be completed, the whole fan is not required to be disassembled and assembled in the replacement process, and only the disassembly and assembly of the blade to be replaced are required, thereby shortening the construction period required by the replacement of the fan blade, further improving the construction efficiency and reducing the required economic cost.

Description

Single blade replacement device for small fan

Technical Field

The utility model relates to the technical field of blade replacement of wind driven generators, in particular to a single blade replacement device of a small fan.

Background

The wind generating set consists of a tower barrel, a cabin and a plurality of blades, wherein the bottom end of the tower barrel is fixedly arranged on the ground, the cabin is positioned at the top of the tower barrel, the plurality of blades are uniformly distributed on the cabin through a connecting flange, the blades are driven to rotate through wind power, and a speed increaser in the cabin is used for lifting the rotating speed so as to promote a generator to generate electricity.

The blade is one of the key components of the fan, and the blade is easy to damage in the working process of the fan because the whole blade is exposed to the outside for a long time, and the blade needs to be replaced.

When the blades are replaced at present, the whole fan is required to be disassembled firstly, and then the fan is converted into a horizontal state from a vertical state through two cranes, so that an operator can complete the replacement of the blades on the ground, and after the replacement of the blades is completed, the recombination of the whole fan is completed according to the assembly sequence; the process leads to longer required construction period for replacing the fan blade, low construction efficiency and higher economic cost.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a single-blade replacement device for a small fan.

The utility model provides a single-blade replacement device for a small fan, which adopts the following technical scheme:

a single-blade replacement device of a small fan comprises an overhaul mechanism, a blade root clamp and a blade lifting mechanism; the overhaul mechanism comprises a lifting piece and an overhaul platform, wherein the lifting piece is arranged on the engine room and is used for lifting the overhaul platform to the top of the tower barrel; the blade root clamp is used for clamping and fixing the blade root to be replaced; the blade lifting mechanism comprises a pulley, a winch and a steel wire rope, wherein the pulley is arranged on the engine room, and the steel wire rope is wound on the winch and is connected with the blade root clamp and the pulley.

Through adopting the technical scheme, when the blade is required to be replaced, the maintenance mechanism is lifted to the top of the tower through the lifting piece, an operator moves to the blade through the maintenance mechanism, then the pulley is installed on the cabin, the root of the blade to be replaced is clamped and fixed through the blade root clamp, the steel wire rope penetrates through the pulley and is connected with the blade root clamp, a lifting point is formed at the position of the pulley, the operator then separates the blade to be replaced from the cabin, and the steel wire rope is in a loosening state, so that the blade to be replaced moves in the direction close to the ground under the action of self gravity, and the blade to be replaced is detached; when the blade to be replaced is pulled to the ground, the blade root clamp is separated from the blade to be replaced, the blade root clamp is clamped and fixed on a new blade, the winch is operated to tension the steel wire rope, the steel wire rope pulls the blade root clamp to move along the direction close to the cabin, the blade is reset, and an operator completes fixation of the new blade and the cabin part through the maintenance platform; the cooperation of each part of above-mentioned in-process can accomplish the change to fan blade, and the change in-process need not to carry out dismouting reorganization to whole fan, only need accomplish the dismouting of required change blade can, shorten the required construction cycle of fan blade change from this, and then improve the efficiency of construction, also alleviate required economic cost.

Optionally, the blade root anchor clamps include left semi-ring and the right semi-ring of relative setting, left semi-ring with the opposite one side of right semi-ring forms the annular chamber that is used for the centre gripping to need change the blade root, be provided with the fastener that is used for fixing the right semi-ring on the left semi-ring.

Through adopting above-mentioned technical scheme, when left semi-ring and right semi-ring are mutually pasted, need change blade root and lie in the annular chamber, be fixed in left semi-ring through the fastener with right semi-ring afterwards, from this carry out left semi-ring and right semi-ring's fixed, and then will need change blade root centre gripping fixed, easy and simple to handle, and easy dismouting.

Optionally, the fastener includes two left extension boards, two right extension boards and two fastening bolts, two left extension boards are fixed in respectively the left semi-ring both sides, two right extension boards are fixed in respectively the right semi-ring both sides, two fastening bolts wears to locate respectively on a left extension board, two fastening bolts wears to establish corresponding right extension board respectively.

Through adopting above-mentioned technical scheme, when left semi-ring and right semi-ring are mutually pasted, two left extension boards are laminated with the right extension board that corresponds respectively, need change blade root by the centre gripping be fixed in between left semi-ring and the right semi-ring, rotate fastening bolt's nut afterwards for fastening bolt's tip portion and left extension board butt, nut and right extension board butt are fixed left semi-ring and right semi-ring from this.

Optionally, the opposite sides of the left half ring and the right half ring are respectively provided with a protection soft cushion.

Through adopting above-mentioned technical scheme, when left semi-ring and right semi-ring will need change blade root centre gripping, protection cushion and need change blade root direct contact and receive the extrusion, make left semi-ring and right semi-ring and need change blade root's connection more inseparable from this, and then improve the stability when needing to change blade root by fixed, and avoid the rigidity collision between blade root and left semi-ring and the right semi-ring production of need changing, cause the blade root that needs to change to receive the damage.

Optionally, two pulleys are provided, and the two pulleys are symmetrically distributed along the center line of the blade to be replaced.

Through adopting above-mentioned technical scheme, wire rope connects gradually a pulley machine, blade root anchor clamps and another pulley machine, and two pulley machines form a hoisting point respectively, and two hoisting points are along the central line direction symmetric distribution of blade that needs to be changed, and two hoisting points and the centrobaric link of blade that needs to be changed form the triangle structure, and the focus of blade that needs to be changed is located the below of triangle structure, and then improves the stability when blade that needs to be changed moves along the ground direction.

Optionally, the maintenance platform comprises a fixed table and a movable table, the lifting piece is used for lifting the fixed table, and the movable table is slidably arranged on the fixed table; the fixed table is provided with a first driving motor, an output shaft of the first driving motor is coaxially and fixedly connected with a gear, and the movable table is provided with a rack meshed with the gear.

Through adopting above-mentioned technical scheme, after the lifting member lifts the fixed station to tower section of thick bamboo top, first driving motor operation, and then drive gear rotates, and the rotation of gear drives the rack and removes, makes the movable table slide to expanding from this, and operating personnel can remove to constructing from the blade closer department through the movable table, enlarges construction platform from this, improves security and the convenience in the operating personnel work progress.

Optionally, a guide block is arranged on the movable table, a guide groove is formed in the fixed table, and the guide block is located in the guide groove and is in sliding fit with the guide groove.

Through adopting above-mentioned technical scheme, the gliding in-process of movable table, the guide block is located the guide way and slides, restricts the slip direction of movable table from this, improves the stability of movable table slip in-process, avoids the gliding in-process of movable table to appear the condition of dislocation, ensures the meshing of gear and rack.

Optionally, the lifting part comprises a fixing frame fixed on the cabin, a connecting hole is formed in the fixing part, a hanging bracket is detachably connected to the connecting hole, and a lifting lug is arranged on the hanging bracket; the maintenance platform is provided with a second driving motor, an output shaft of the second driving motor is coaxially and fixedly connected with a winding roller, a winding rope is wound on the winding roller, one end of the winding rope is fixed on the winding roller, and the other end of the winding rope is connected with the lifting lug.

Through adopting above-mentioned technical scheme, the mount is fixed in on the cabin and is used for connecting the gallows, and the gallows passes through the lug to be connected with the rolling rope, when needs lift maintenance platform to tower section of thick bamboo top, the second driving motor drives the wind-up roll rotatory, and the winding rope twines on the wind-up roll, lifts maintenance platform to required height to be convenient for operating personnel, after the blade is changed and is accomplished, with the gallows dismantle from the mount can.

Optionally, the blade fixing device further comprises a blade clamp for clamping the fixed blade and a sheath for wrapping the blade, wherein the sheath is arranged on the blade clamp.

Through adopting above-mentioned technical scheme, when carrying out the centre gripping fixedly to the blade root that needs to be changed through the blade root anchor clamps, the blade anchor clamps also carry out the centre gripping fixedly with the blade, and the sheath cover is located on the blade anchor clamps, and then makes the whole parcel of blade to protect the blade, avoid the blade surface to receive the damage or scrape and scratch, improve the reliability in the change process.

Optionally, the device further comprises an auxiliary frame, wherein a moving wheel is arranged at the bottom of the auxiliary frame, and clamping blocks are connected to the auxiliary frame in a rotating mode.

Through adopting above-mentioned technical scheme, when the blade moved to blade tip arrival auxiliary frame department along the direction that is close to ground, in the blade tip inserted the clamp splice, with blade tip centre gripping through the clamp splice, the in-process that the blade continued to drop, the auxiliary frame is driven to the travelling wheel moves, adjust the decline gesture and the position of blade from this, make the blade follow vertical state to the horizontality, and then be convenient for follow-up transport the blade through conveyer, avoid the in-process that the blade descends simultaneously, collide with the tower section of thick bamboo, cause the damage to the tower section of thick bamboo from this, promote the stability of blade descending and promotion in-process.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the replacement of the fan blade can be completed, the whole fan is not required to be disassembled and assembled in the replacement process, and only the disassembly and assembly of the blade to be replaced are required to be completed, so that the construction period required by the replacement of the fan blade is shortened, the construction efficiency is improved, and the required economic cost is reduced;

2. when the left half ring and the right half ring clamp the blade root to be replaced, the protection cushion is in direct contact with the blade root to be replaced and is extruded, so that the connection between the left half ring and the right half ring and the blade root to be replaced is tighter, the stability of the blade root to be replaced when being fixed is improved, and rigid collision between the blade root to be replaced and the left half ring and the right half ring is avoided, and the blade root to be replaced is damaged;

3. when the blade moves to the blade tip along the direction that is close to ground and arrives auxiliary frame department, in the blade tip inserts the clamp splice, through the clamp splice with blade tip centre gripping, the in-process that the blade continuously descends, the shift wheel drives auxiliary frame and removes, from this to the descending gesture and the position of blade adjust, make the blade follow vertical state to the horizontality, and then be convenient for follow-up transport the blade through conveyer, avoid the in-process that the blade descends simultaneously, collide with the tower section of thick bamboo, cause the damage to the tower section of thick bamboo from this, promote the stability of blade landing and promotion in-process.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a single blade replacement device for a small fan in an embodiment of the present utility model;

FIG. 2 is a schematic view of the service platform of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is an enlarged view of portion B of FIG. 1;

FIG. 5 is a schematic view of the auxiliary frame of FIG. 1;

FIG. 6 is a schematic illustration of the cooperation of the pulley machine and the blade root fixture of FIG. 1.

Reference numerals illustrate: 1. a nacelle; 2. a tower; 3. a blade; 4. an overhaul mechanism; 41. a lifting member; 411. a fixing frame; 412. a connection hole; 413. a hanging bracket; 414. lifting lugs; 415. a second driving motor; 416. a wind-up roll; 417. winding the rope; 42. a maintenance platform; 421. a fixed table; 422. a movable table; 5. blade root clamp; 51. a left half ring; 52. a right half ring; 53. a left extension plate; 54. a right extension plate; 55. a fastening bolt; 6. a blade lifting mechanism; 61. a pulley machine; 62. a hoist; 63. a wire rope; 64. a buckle; 7. a blade clamp; 8. a sheath; 9. an auxiliary frame; 10. a moving wheel; 11. clamping blocks; 12. a first driving motor; 13. a gear; 14. a rack; 15. a guide block; 16. a guide groove.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-6.

The embodiment of the utility model discloses a single-blade replacement device for a small fan. Referring to fig. 1, a small fan single-blade-to-blade 3 replacement device comprises an overhaul mechanism 4, a blade root clamp 5 and a blade lifting mechanism 6; the overhaul mechanism 4 comprises a lifting piece 41 and an overhaul platform 42, wherein the lifting piece 41 is arranged on the engine room 1 and is used for lifting the overhaul platform 42 to the top of the tower 2; the blade root clamp 5 is used for clamping and fixing the root of the blade 3 to be replaced; the blade lifting mechanism 6 comprises two pulleys 61, a winch 62 and a steel wire rope 63 wound on the winch 62, wherein the two pulleys 61 are symmetrically distributed on the engine room 1 along the center line of the blade 3 to be replaced to form two lifting points, one end of the steel wire rope 63 is fixed on the winch 62, and the other end of the steel wire rope 63 is sequentially connected with one pulley 61, the blade root clamp 5 and the other pulley 61 and then is fixed with the winch 62.

Referring to fig. 2 and 3, the lifting member 41 includes a fixing frame 411 fixed on the nacelle 1, a connection hole 412 is formed on the fixing member, a hanger 413 is connected to the connection hole 412 through a bolt, and a lifting lug 414 is fixed on the hanger 413; the maintenance platform 42 is provided with a second driving motor 415, the second driving motor 415 is a double-output shaft motor, two output shafts of the second driving motor 415 are respectively and coaxially fixedly connected with a winding roller 416, the winding roller 416 is wound with a winding rope 417, one end of the winding rope 417 is fixed on the winding roller 416, and the other end of the winding rope 417 is connected with a lifting lug 414; the mount 411 is fixed in on the cabin 1 and is used for connecting gallows 413, and gallows 413 passes through lug 414 and winding rope 417 to be connected, when needs lift maintenance platform 42 to tower section of thick bamboo 2 top, and second driving motor 415 drives wind-up roll 416 rotation, and winding rope 417 twines on wind-up roll 416, lifts maintenance platform 42 to required height.

Referring to fig. 2 and 4, the maintenance platform 42 includes a fixed table 421 and a movable table 422, the hanger 413 is used for lifting the fixed table 421, the movable table 422 is slidably disposed on the fixed table 421, the movable table 422 is fixed with a guide block 15, the fixed table 421 is provided with a guide groove 16, and the guide block 15 is located in the guide and slidably cooperates with the guide groove 16; the fixed table 421 is provided with a first driving motor 12, the first driving motor 12 is a double-output shaft motor, two output shafts of the first driving motor 12 are respectively and coaxially fixedly connected with a gear 13, and the movable table 422 is fixedly provided with a rack 14 meshed with the gear 13; after the lifting member 41 lifts the fixed table 421 to the top of the tower 2, the first driving motor 12 operates to drive the gear 13 to rotate, and the rotation of the gear 13 drives the rack 14 to move, so that the movable table 422 slides to be unfolded, and in the sliding process of the movable table 422, the guide block 15 slides in the guide groove 16, and an operator can move to a position closer to the blade 3 to be replaced through the movable table 422 for construction, thereby expanding the construction platform.

Referring to fig. 1 and 5, the replacement device for the small fan blade 3 to be replaced further comprises an auxiliary frame 9, wherein a moving wheel 10 is arranged at the bottom of the auxiliary frame 9, and a U-shaped clamping block 11 is rotatably connected to the auxiliary frame 9; when the blade 3 to be replaced moves along the direction close to the ground and reaches the auxiliary frame 9, the end part of the blade 3 to be replaced is inserted into the clamping block 11, the end part of the blade 3 to be replaced is clamped through the clamping block 11, and the auxiliary frame 9 is driven to move by the moving wheel 10 in the process that the blade 3 to be replaced continuously falls, so that the descending posture and the position of the blade 3 to be replaced are adjusted, and the blade 3 to be replaced is in a vertical state to a horizontal state.

Referring to fig. 1 and 6, the blade root fixture 5 includes a left half ring 51 and a right half ring 52 which are oppositely arranged, wherein, one side of the left half ring 51 and one side of the right half ring 52 which are opposite form an annular cavity for clamping the root of the blade 3 to be replaced, a protection cushion is fixed in the annular cavity, two sides of the left half ring 51 are respectively integrally formed with a left extending plate 53, two left extending plates 53 are respectively penetrated with a fastening bolt 55, two sides of the right half ring 52 are respectively integrally formed with a right extending plate 54, and the fastening bolts 55 are respectively penetrated with the corresponding right extending plates 54; when the left half ring 51 and the right half ring 52 are mutually attached, the two left extending plates 53 are respectively attached to the corresponding right extending plates 54, the root of the blade 3 to be replaced is clamped and fixed in the annular cavity between the left half ring 51 and the right half ring 52, the protection cushion is directly contacted with the root of the blade 3 to be replaced and extruded, the connection between the left half ring 51 and the right half ring 52 and the root of the blade 3 to be replaced is tighter, then nuts of the fastening bolts 55 are rotated, the end head portions of the fastening bolts 55 are abutted to the left extending plates 53, and the nuts are abutted to the right extending plates 54, so that the left half ring 51 and the right half ring 52 are fixed, and the root of the blade 3 to be replaced is clamped and fixed.

Referring to fig. 1 and 6, two left extending plates 53 and two right extending plates 54 are respectively provided with a through hole, when the left half ring 51 and the right half ring 52 are closed, the left extending plates 53 are respectively attached to the corresponding right extending plates 54, the corresponding through holes on the left extending plates 53 and the right extending plates 54 are aligned, so that two groups of through holes are formed, and the two groups of through holes are symmetrically distributed along the center line of the blade 3 to be replaced; two steel wire ropes 63 are selected, one steel wire rope 63 is fixed on a winch 62, one end far away from the winch 62 is fixed with a buckle 64, and the buckle 64 is clamped in a group of through holes so as to be fixedly connected with one side of the left half ring 51; one end of the other wire rope 63 is fixed on the winch 62, the other end is fixed with a buckle 64, and the buckle 64 is clamped in the other group of holes so as to be fixedly connected with the other side of the left half ring 51; this is provided to complete the connection of the entire cable 63, the two pulleys 61 and the root fixture 5.

In the embodiment of the present utility model, two steel wires 63 are selected for practical use, and in other embodiments, one pulley 61 may be sequentially connected to one another through one steel wire 63, one group of through holes may be perforated, the other group of through holes may be perforated, and then the other pulley 61 may be connected.

Referring to fig. 1, the blade 3 to be replaced is clamped with a blade clamp 7, a rope is fixed on the blade clamp 7, a hole through which the rope passes is formed in the blade root clamp 5, the blade clamp 7 is connected with the blade root clamp 5, a sheath 8 is arranged on the blade clamp 7, when the root of the blade 3 to be replaced is clamped and fixed through the blade root clamp 5, the blade clamp 7 clamps the blade, the sheath 8 is sleeved on the blade clamp 7, the diameter of the sheath 8 is smaller than the maximum diameter of the blade 3 to be replaced, the whole blade 3 to be replaced is wrapped, the blade 3 to be replaced is protected, and the air posture of the blade 3 to be replaced can be further stabilized by matching with the blade root clamp 5.

The embodiment of the utility model relates to a single-blade replacement device for a small fan, which comprises the following implementation principles: when the blade 3 needs to be replaced, the position of the blade 3 to be replaced is controlled, so that the center line of the blade 3 to be replaced is parallel to the axis of the tower 2, the hanging frame 413 is connected to the fixed frame 411 through the hanging lug 414, the second driving motor 415 drives the winding roller 416 to rotate, the winding rope 417 is wound on the winding roller 416, the maintenance platform 42 is lifted to the top of the tower 2, and an operator moves to the position of the blade 3 to be replaced through the movable table 422; then, installing two pulleys 61, wherein the two pulleys 61 are symmetrically distributed along the center line of the blade 3 to be replaced, the two pulleys 61 are installed on the cabin 1 at the root position close to the blade 3 not to be replaced, the two pulleys 61 respectively form a hanging point, the two hanging points are symmetrically distributed along the direction of the center line of the blade 3 to be replaced, the two hanging points and the connecting line of the gravity centers of the blade 3 to be replaced form a triangular structure, and the gravity center of the blade 3 to be replaced is positioned at the lowest part of the triangular structure; then the root of the blade 3 to be replaced is clamped and fixed by the cooperation of the left half ring 51 and the right half ring 52, a winch 62 is positioned on the ground, and a steel wire rope 63 on the winch 62 is connected with a pulley machine 61 and a blade root clamp 5; the operator then separates the blade 3 to be replaced from the nacelle 1, and the wire rope 63 is in a relaxed state, so that the blade 3 to be replaced moves in a direction approaching the ground under the action of self gravity, thereby completing the disassembly of the blade 3 to be replaced; when the blade 3 to be replaced is pulled to the ground, the left half ring 51 and the right half ring 52 are separated from the blade 3 to be replaced, the left half ring 51 and the right half ring 52 are clamped and fixed on a new blade 3, then the blade root clamp 5 is pulled to move along the direction close to the engine room 1 by the operation of the winch 62 to enable the new blade 3 to be reset, and an operator completes the installation of the new blade 3 through the overhaul platform 42; the cooperation of each part of above-mentioned in-process can accomplish the change to fan need change blade 3, and in the change process, need not to carry out dismouting reorganization to whole fan, only need accomplish the dismouting of blade 3 can, shorten the required construction cycle of fan blade 3 change from this, and then improve the efficiency of construction, also alleviate required economic cost.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. The utility model provides a little fan single blade change device which characterized in that: comprises an overhaul mechanism (4), a blade root clamp (5) and a blade lifting mechanism (6);

the overhaul mechanism (4) comprises a lifting piece (41) and an overhaul platform (42), wherein the lifting piece (41) is arranged on the engine room (1) and is used for lifting the overhaul platform (42) to the top of the tower (2);

the blade root clamp (5) is used for clamping and fixing the root of the blade (3) to be replaced;

the blade lifting mechanism (6) comprises a pulley (61), a winding machine (62) and a steel wire rope (63), wherein the pulley (61) is arranged on the engine room (1), and the steel wire rope (63) is wound on the winding machine (62) and is connected with the blade root clamp (5) and the pulley (61).

2. The small fan single blade replacement apparatus of claim 1, wherein: the blade root clamp (5) comprises a left half ring (51) and a right half ring (52) which are oppositely arranged, an annular cavity for clamping the root of the blade (3) to be replaced is formed on one side of the left half ring (51) opposite to the right half ring (52), and a fastener for fixing the right half ring (52) is arranged on the left half ring (51).

3. The small fan single blade replacement apparatus according to claim 2, wherein: the fastener comprises two left extension plates (53), two right extension plates (54) and two fastening bolts (55), wherein the two left extension plates (53) are respectively fixed on two sides of the left half ring (51), the two right extension plates (54) are respectively fixed on two sides of the right half ring (52), the two fastening bolts (55) are respectively arranged on one left extension plate (53) in a penetrating mode, and the two corresponding right extension plates (54) are respectively arranged in a penetrating mode through the two fastening bolts (55).

4. The small fan single blade replacement apparatus according to claim 2, wherein: the opposite sides of the left half ring (51) and the right half ring (52) are respectively provided with a protection soft cushion.

5. The small fan single blade replacement apparatus of claim 1, wherein: two pulleys (61) are arranged, and the two pulleys (61) are symmetrically distributed along the center line of the blade (3) to be replaced.

6. The small fan single blade replacement apparatus of claim 1, wherein: the maintenance platform (42) comprises a fixed platform (421) and a movable platform (422), the lifting piece (41) is used for lifting the fixed platform (421), and the movable platform (422) is slidably arranged on the fixed platform (421); the fixed table (421) is provided with a first driving motor (12), an output shaft of the first driving motor is coaxially and fixedly connected with a gear (13), and the movable table (422) is provided with a rack (14) meshed with the gear (13).

7. The small fan single blade replacement apparatus of claim 6, wherein: the movable table (422) is provided with a guide block (15), the fixed table (421) is provided with a guide groove (16), and the guide block (15) is positioned in the guide groove (16) and is in sliding fit with the guide groove (16).

8. The small fan single blade replacement apparatus of claim 1, wherein: the lifting piece (41) comprises a fixing frame (411) fixed on the engine room (1), a connecting hole (412) is formed in the fixing piece, a hanging frame (413) is detachably connected to the connecting hole (412), and a lifting lug (414) is arranged on the hanging frame (413); the maintenance platform (42) is provided with a second driving motor (415), an output shaft of the second driving motor is coaxially and fixedly connected with a winding roller (416), a winding rope (417) is wound on the winding roller (416), one end of the winding rope (417) is fixed on the winding roller (416), and the other end of the winding rope is connected with the lifting lug (414).

9. The small fan single blade replacement apparatus of claim 1, wherein: the novel blade clamp further comprises a blade clamp (7) for clamping and fixing the blade (3) to be replaced and a sheath (8) for wrapping the blade (3) to be replaced, wherein the sheath (8) is arranged on the blade clamp (7).

10. The small fan single blade replacement apparatus of claim 1, wherein: the automatic clamping device is characterized by further comprising an auxiliary frame (9), wherein a moving wheel (10) is arranged at the bottom of the auxiliary frame (9), and clamping blocks (11) are connected to the auxiliary frame (9) in a rotating mode.